Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758880AbZFPQl1 (ORCPT ); Tue, 16 Jun 2009 12:41:27 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752363AbZFPQlU (ORCPT ); Tue, 16 Jun 2009 12:41:20 -0400 Received: from hawking.rebel.net.au ([203.20.69.83]:50120 "EHLO hawking.rebel.net.au" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751547AbZFPQlT (ORCPT ); Tue, 16 Jun 2009 12:41:19 -0400 Message-ID: <4A37CB2A.6010209@davidnewall.com> Date: Wed, 17 Jun 2009 02:11:14 +0930 From: David Newall User-Agent: Thunderbird 2.0.0.21 (X11/20090318) MIME-Version: 1.0 To: Ralf Gross CC: linux-kernel@vger.kernel.org Subject: Re: io-scheduler tuning for better read/write ratio References: <20090616154342.GA7043@p15145560.pureserver.info> In-Reply-To: <20090616154342.GA7043@p15145560.pureserver.info> Content-Type: text/plain; charset=windows-1251 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 478 Lines: 11 Ralf Gross wrote: > write throughput is much higher than the read throughput (40 MB/s > read, 90 MB/s write). Perhaps I've misunderstood, but isn't that common? Reads have to come from disk, whereas writes get cached by the drive. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/